7011 ACD/P4AQBTA
7000 Series Super Precision Angular Contact Ball Bearings
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7011 ACD/P4AQBTA Bearing Product Overview & Core Advantages
The 7011 ACD/P4AQBTA is a precision angular contact ball bearing designed for ultra-high performance applications requiring exceptional rigidity and accuracy. This matched quadruplex set in a tandem back-to-back (QBT) arrangement is engineered to handle significant combined loads while providing maximum system stiffness. Manufactured to P4A tolerance class with an extra light preload (Class A), it delivers outstanding running accuracy and is optimized for high-speed operation up to 34,000 rpm, making it an ideal solution for the most demanding machine tool and precision equipment applications.
7011 ACD/P4AQBTA Bearing Model Code Explained, Specifications & Naming Convention
- 7011: Basic bearing designation (55mm bore, 90mm OD, 72mm width)
- ACD: 25° contact angle design optimized for combined radial and axial loads
- P4A: High precision tolerance class exceeding ABEC 7 standards
- QB: Quadruplex Back-to-Back matched set arrangement
- T: Tandem mounting within each pair for maximum axial stiffness
- A: Extra light preload (Class A) for minimal friction at high speeds
7011 ACD/P4AQBTA Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Rigidity: The 25° contact angle provides optimal balance between radial and axial load capacity, while the quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of resisting moment loads and maintaining precision under heavy cutting forces.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring consistent performance and interchangeability within the matched set.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 34,000 rpm, while the extra light preload minimizes heat generation.
Superior Load Ratings: With a dynamic load rating of 22,388 lbf and static load rating of 28,125 lbf, this bearing set delivers exceptional longevity under demanding operating conditions.
7011 ACD/P4AQBTA Bearing Typical Application Areas
This high-precision quadruplex bearing set is specifically designed for applications requiring maximum rigidity and accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Grinding Spindles: Internal and external grinding applications
- High-Speed Machining Centers requiring extreme positional accuracy
- Aerospace Manufacturing Equipment: Composite material machining spindles
- Medical Device Manufacturing Equipment: Precision machining applications
